Cloudsurfer Max: Built for Long Miles. Made for You. Experience premium cushioning and smooth transitions with On’s most supportive daily trainer yet. CloudTec Phase® technology for seamless movement Helion™ superfoam for responsive comfort Breathable mesh upper for secure lockdown High stack design (37mm heel / 6mm drop) for max protection without compromise Whether you're building your base or going long on weekends, the Cloudsurfer Max is your high-mileage hero.